REFERENCES
- Allebrandt KV, Teder-Laving M, Kantermann T, et al. (2014). Chronotype and sleep duration: The influence of season of assessment. Chronobiol Int. 31:731–40
- Alshahrani S, McGill J, Agarwal A. (2013). Prostatitis and male infertility. J Reprod Immunol. 100:30–6
- Andolz P, Bielsa MA, Andolz A. (2001). Circannual variation in human semen parameters. Int J Androl. 24:266–71
- Arendt J. (2006). Melatonin and human rhythms. Chronobiol Int. 23:21–37
- Baker HW, Burger HG, de Kretser DM, et al. (1981). Factors affecting the variability of semen analysis results in infertile men. Int J Androl. 4:609–22
- Bonde JP. (2013). Occupational causes of male infertility. Curr Opin Endocrinol Diabetes Obes. 20:234–9
- Borisenkov MF. (2011). The pattern of entrainment of human sleep-wake rhythm by the natural photoperiod in the north. Chronobiol Int. 28:921–9
- Carlsen E, Petersen JH, Andersson AM, Skakkebaek NE. (2004). Effects of ejaculatory frequency and season on variations in semen quality. Fertil Steril. 82:358–66
- Chen Z, Godfrey-Bailey L, Schiff I, Hauser R. (2004). Impact of seasonal variation, age and smoking status on human semen parameters: The Massachusetts General Hospital experience. J Exp Clin Assist Reprod. 1:2
- Chen Z, Toth T, Godfrey-Bailey L, et al. (2003). Seasonal variation and age-related changes in human semen parameters. J Androl. 24:226–31
- Cooper TG, Noonan E, von Eckardstein S, et al. (2010). World Health Organization reference values for human semen characteristics. Hum Reprod Update. 16:231–45
- Dabbs JM Jr. (1990). Age and seasonal variation in serum testosterone concentration among men. Chronobiol Int. 7:245–9
- Dentali F, Ageno W, Rancan E, et al. (2011). Seasonal and monthly variability in the incidence of venous thromboembolism. A systematic review and a meta-analysis of the literature. Thromb Haemost. 106:439–47
- Dinulovic D, Radonjic G. (1990). Diabetes mellitus/male infertility. Arch Androl. 25:277–93
- Gallerani M, Boari B, Smolensky MH, et al. (2007). Seasonal variation in occurrence of pulmonary embolism: Analysis of the database of the Emilia-Romagna region, Italy. Chronobiol Int. 24:143–60
- Gyllenborg J, Skakkebaek NE, Nielsen NC, et al. (1999). Secular and seasonal changes in semen quality among young Danish men: A statistical analysis of semen samples from 1927 donor candidates during 1977–1995. Int J Androl. 22:28–36
- Hadlow NC, Brown S, Wardrop R, Henley D. (2014). The effects of season, daylight saving and time of sunrise on serum cortisol in a large population. Chronobiol Int. 31:243–51
- Håkonsen LB, Thulstrup AM, Aggerholm AS, et al. (2011). Does weight loss improve semen quality and reproductive hormones? Results from a cohort of severely obese men. Reprod Health. 8:24
- Henkel R, Menkveld R, Kleinhappl M, Schill WB. (2001). Seasonal changes in human sperm chromatin condensation. J Assist Reprod Genet. 18:371–7
- Heráček J, Hrbáček J, Sobotka V, et al. (2012). HIV and male infertility disorders. Klin Mikrobiol Infekc Lek. 18:150–5
- Hickman RA, Gordon C. (2011). Causes and management of infertility in systemic lupus erythematosus. Rheumatology (Oxford). 50:1551–8
- Hotaling JM. (2014). Genetics of male infertility. Urol Clin North Am. 41:1–17
- Kruger TF, Ackerman SB, Simmons KF, et al. (1987). A quick, reliable staining technique for human sperm morphology. Arch Androl. 18:275–7
- Lee HC, Hu CJ, Chen CS, Lin HC. (2008). Seasonal variation in ischemic stroke incidence and association with climate: A six-year population-based study. Chronobiol Int. 25:938–49
- Lin HC, Lin CC, Chen CS, Lin HC. (2009). Seasonality of pneumonia admissions and its association with climate: An eight-year nationwide population-based study. Chronobiol Int. 26:1647–59
- MacDonald AA, Herbison GP, Showell M, Farquhar CM. (2010). The impact of body mass index on semen parameters and reproductive hormones in human males: A systematic review with meta-analysis. Hum Reprod Update. 16:293–311
- Malm G, Haugen TB, Henrichsen T, et al. (2004). Reproductive function during summer and winter in Norwegian men living north and south of the Arctic circle. J Clin Endocrinol Metab. 89:4397–402
- Manfredini R, Boari B, Smolensky MH, et al. (2005). Seasonal variation in onset of myocardial infarction – A 7-year single-center study in Italy. Chronobiol Int. 22:1121–35
- Matchock RL, Dorn LD, Susman EJ. (2007). Diurnal and seasonal cortisol, testosterone, and DHEA rhythm in boys and girls during puberty. Chronobiol Int. 24:969–90
- Meeker JD, Godfrey-Bailey L, Hauser R. (2007). Relationships between serum hormone levels and semen quality among men from an infertility clinic. J Androl. 28:397–406
- Modesti PA. (2013). Season, temperature and blood pressure: A complex interaction. Eur J Intern Med. 24:604–7
- Moskovic DJ, Eisenberg ML, Lipshultz LI. (2012). Seasonal fluctuations in testosterone-estrogen ratio in men from the Southwest United States. J Androl. 33:1298–304
- Moura FA, Dutra-Rodrigues MS, Cassol AS, et al. (2013). Impact of seasonality on the prevalence of dyslipidemia: A large population study. Chronobiol Int. 30:1011–15
- Odisho AY, Nangia AK, Katz PP, Smith JF. (2014). Temporal and geospatial trends in male factor infertility with assisted reproductive technology in the United States from 1999–2010. Fertil Steril. 102:469–75
- Ombelet W, Maes M, Vandeput H, et al. (1996). Chronobiological fluctuations in semen parameters with a constant abstinence period. Arch Androl. 37:91–6
- Ortiz A, Espino J, Bejarano I, et al. (2011). High endogenous melatonin concentrations enhance sperm quality and short-term in vitro exposure to melatonin improves aspects of sperm motility. J Pineal Res. 50:132–9
- Palomba S, Sereni G, Falbo A, et al. (2014). Inflammatory bowel diseases and human reproduction: A comprehensive evidence-based review. World J Gastroenterol. 20:7123–36
- Persson R, Garde AH, Hansen AM, et al. (2008). Seasonal variation in human salivary cortisol concentration. Chronobiol Int. 25:923–37
- Rajender S, Monica MG, Walter L, Agarwal A. (2011). Thyroid, spermatogenesis, and male infertility. Front Biosci (Elite Ed). 3:843–55
- Revel FG, Saboureau M, Masson-Pevet M, et al. (2006). KISS-1: A likely candidate for the photoperiodic control of reproduction in seasonal breeders. Chronobiol Int. 23:277–87
- Saint Pol P, Beuscart R, Leroy-Martin B, et al. (1989). Circannual rhythms of sperm parameters of fertile men. Fertil Steril. 51:1030–3
- Smith RP, Coward RM, Kovac JR, Lipshultz LI. (2013). The evidence for seasonal variations of testosterone in men. Maturitas. 74:208–12
- Spira A. (1984). Seasonal variations of sperm characteristics. Arch Androl. 12:23–8
- Teerds KJ, de Rooij DG, Keijer J. (2011). Functional relationship between obesity and male reproduction: From humans to animal models. Hum Reprod Update. 17:667–83
- Vitale J, Manfredini R, Gallerani M, et al. (2014). Chronobiology of acute aortic rupture or dissection: A systematic review and a meta-analysis of the literature. Chronobiol Int. 21:1–10
- Wang C, Cui YG, Wang XH, et al. (2007). Transient scrotal hyperthermia and levonorgestrel enhance testosterone-induced spermatogenesis suppression in men through increased germ cell apoptosis. J Clin Endocrinol Metab. 92:3292–304
- Winters BR, Walsh TJ. (2014). The epidemiology of male infertility. Urol Clin North Am. 41:195–204
- Yogev L, Kleiman S, Shabtai E, et al. (2004). Seasonal variations in pre- and post-thaw donor sperm quality. Hum Reprod. 19:880–5
- Zhang XZ, Liu JH, Sheng HQ, et al. (2013). Seasonal variation in semen quality in China. Andrology. 1:639–43